edit: To me, another view of the same forces orchetrated is in using a pull line. Each(pulley and pull line) is a line exerting force and direction on spar/support. Feeding that pull line over the top of target and down the back'spine' to anchor above hinging, makes it (pull line) a 2 leg pull like pulley use or support etc. i guess that is my feeble claim to this not being a derailmeant, but rather a different angle to view and understand the facets of this gem!
This is where i see force storage from in lacing pull ine over the top of a target and tying off at base. Initiate the pull, leverage the line(bend perpendicular to it's travel in a straight line; when it is tensioned enough to resist such bending, thus power rather than distance is achieved) on the control side of the friction, so that the load leg (here the leg being pulled) sweats a purchase of line (leaving less line, over same distance on control/passive anchor side for line at higher tension on that side of frictions). Thus, the 2x effect of a Turn is dependant on the degree of arch, and the tension of each leg. Zer0 degrees deflection/inline gives 2x potential/(Equal tension with no firction). Frictions interfering/buffering from loading to control leg, makes less than the 2xLoading potential, but frictions allowing capture of increased tension into control leg to bring the force at bend back up to the 2xLoad potential - or beyond. So that the frictions work for us to allow storage in the more isolated leg.
In good wood up to task and flex(of hinge, but then also of spar later), i try to pull straight on to gunned face(pull line direction variable), and then use hinge pattern as another multiplier (to carry the off ballance of the 'load'/tree) of the pull line force(by keeping hinge en route to off balance fall, rather than countering it directly with line, if hinge isn't in force route to control sidelean/line- where rope addresses side lean directly without routing thru hinge to do so). In less favorable wood, then would pull off gun counter to sideload (some, trying to keep as much of hinge multiplier in game). Thus, might, leverage line again during back cut, whatever is maximum of tensions at first fold of hinge(without forcing tooo thick a hinge that can give other complication).
1 loss hear to monitor though, is that a line has a direction of itself, as we go to 2 legs, each is a modified direction of the other's direction (and force, imagery of each leg as seperate device force contributing to whole at bend). Now, when frictions/friction buffer limit loading to control leg('cheating' us out of some of our 2xLoad-pull potential along with openness of angle decreasing force at bend from 2x potential), for less force on spar. But, the friction buffer also gives gift by maintaining more of an across the spar as direction factor with that total force(s) applied to it. Thus, more of a leveraging(geometric / multiplying) than inline(nominal/'additive' potential) use of said total force(s). By increasing the tension of the control leg, we are increaing the tension potential at bend(to better), but changing the direction of total foce to less across spar and more inline(lesser use of said increased force). At sum point(s) that trade(of more favorable force traded for less favorable direction) can werk against our target of maximizing inputs of all multipliers.
Another good storage position woud be any wood flex/leaf spring achieved. Concerted in tandem, both of these strategies give additional pressure on formation of hinge at first folding for more controlled fall/fold to rig etc. (by stronger hinge for more speed and direction control). Or stronger force into hinge leverage machine (pattern of hinge) to then handle sidelean 'loads' (of tree moving on hinge).
Becasue of the ying/yang Law of Equal and Opposites, any force(even friction reduction of redirect/dual leg potential) that can work against ye, can be also plotted to werk for ya(here, turn around the assumption that control leg is equal to or less than load leg, or at least capture closer to 2xLoad potential by increasing the control leg's contribution to the whole)! Thus, though s-lightly counter intuitive, the application of force is just as powerful as the relief(in potential). As 1 door closes, another opens; in positive thinking terms of just being happy and orchestrating the given forces more correctedlier (and cleanly/confidentally). For if they(forces) exist, there is no just escaping them, only transferring etc. All the same lessons to re-enforce the other/ L-earn from all IMLHO. (i guess that's my Happy Holidaze speach/ gift/ salutation!).
Orrrrrrrrrr sumetin like'dat.
